From patchwork Tue Apr 9 21:33:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Armin Wolf X-Patchwork-Id: 13623266 Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4B94F158213; Tue, 9 Apr 2024 21:33:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.17.22 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712698440; cv=none; b=hsLj6JwBxfrG/zJ8MJ4cmhXHcU0h+mdPYdXy9FMLp0NoKXZycVgG7+XzzjTePjWw15caBOdYwqhokRz5fxJL/lu3NlfA3pBz8Dq6R0GpKwb8Awj8q1pCavSl6QqpDffcfrGjG8lQ5LNsnu6xqujTpzpUxil9zmZ6DtbguW5P+F8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712698440; c=relaxed/simple; bh=6GDlg+zLBx4PsLbRoItai3KSHzYY5NK1nUnquIRqNRI=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=E8D05nez2smU5HLEdUzrJTMasGRyOfd48DJuWf7s+NaNbs2/crJ9TYZ5CcLT06Ke+I/ZHLZRO/0hafOQ6Ax6b1wkzlxFYYgcDCQZAoHckeMStfjqbcMi0s1J8RuA5MIyAyDJXY0b018qJb6K4cHi2c99XTMacSkJ3S3+cGom+no= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.de; spf=pass smtp.mailfrom=gmx.de; dkim=pass (2048-bit key) header.d=gmx.de header.i=w_armin@gmx.de header.b=OejyuHux; arc=none smtp.client-ip=212.227.17.22 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmx.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmx.de header.i=w_armin@gmx.de header.b="OejyuHux" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.de; s=s31663417; t=1712698408; x=1713303208; i=w_armin@gmx.de; bh=sjuhz+TaLmV9ixOiAi3uRJXQXF3anu1HLOApgAGNu3w=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date; b=OejyuHuxq9kd6VqEiWc4efIV7P2tLRwE60CmjTJCKvPEEeCx1wZ9StpeHtCBZkPa Urc4Gd5fK9g+l12DW/I6GEWnT4hrt4CAUJp/cvtT9K81Z9GGPbqmGKKmBRCFEfjE0 OdSGdaWn9AkB9hWDAij5I/znCxnaMF3KnVCa5bK+qL/ANmnwzjh5hUdB3jeoB860f EOmdIGZwA2Jv/k5s9Ni3GsWsCFBN72rn6WAtCTuzG4xWVsouZpNMfWMKbOO2WRqFq MH3RVZ0sJOXC2ud1azJuBsjaXsjiCNxKz87+FqOud1eBU57Xh6U0K36AH3evclMPY ZfRyjtKApYwwC3DJCg== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from mx-amd-b650.users.agdsn.de ([141.30.226.129]) by mail.gmx.net (mrgmx104 [212.227.17.168]) with ESMTPSA (Nemesis) id 1N6bfq-1sr2Xu1PAs-0181f3; Tue, 09 Apr 2024 23:33:28 +0200 From: Armin Wolf To: mlj@danelec.com, rafael.j.wysocki@intel.com, lenb@kernel.org Cc: jdelvare@suse.com, linux@roeck-us.net, linux@weissschuh.net, ilpo.jarvinen@linux.intel.com, linux-acpi@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: [PATCH v2] ACPI: fan: Add hwmon support Date: Tue, 9 Apr 2024 23:33:23 +0200 Message-Id: <20240409213323.8031-1-W_Armin@gmx.de> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:yYdU5SWqH/bNqNsamsZdNYjgngACK2VgYu9rtYrDw57TzVQOfzk nbwx7FnKGIQD4a8CQDvsHEZ/Ospk5g7w4vd5fY8vJGFGBwg7MiETD/G1gpBdl12yKFbcc2z A0B0HMdpaANJd+A3Ya97MirLbdVG2NtLy1UxNDhf/yeY1inuODu5Nz3awDzud4o6PG0khzh Cmf0GOTxKcwAgCqFJ/GtA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:wtmSOyWMUO4=;7DDBbaFiuDx6Dit4uUKw2lAzbRA k7pkIyPjTCgqpyjA8tgOz/neI3lGQj7fWg26E65YT+M3NP2shf5PJEX7Oqr6eeMEgmeX0mM4o 0M8pDyPdv3Sy5Arh30XY+Wd9PbSqxrbZet5pjcWPEm1lTZs0BbBN+GpZtbW2F1RgCC7neVtjK ViiyTuenqv8liQVouUHwCZKKnDcQihN3YlxNbf/E/41eLbMLlBaypRv3VumgtOtTziiI/yNyQ e4ju/GD0HqHBFILae98JDql4ETFH58Ht/CxXqfKZT/UVyrjSCyLHxg7CkDNx1es/mpDVPiLxX WygY6lpfkj+UJ9o7etf5WTRebiu+Q8U9J7VuGsVcyCdf/T+SDsCYsgibDMsh//+kVjFuod3So Q5PHW+mCldy9Hdq7efwz30J0ljeT2vq22SEqqMzbAq2lSYjEw7Q2+gIWl4DW2Nj1EuRhxukXc kC6CJSG79591XxqBilNEWavox4u3HyVaWCQxGrbnCOnj4cJ33BEboAm5aRkplldsQkx7H7gm8 kMoGd/5s1T8rAHS833amsTd1OkyCflbjHumzsGXAtcUzWy8Ple5ZxD1v782H53gQr/Dek/EEP lSR0GmWKlHsR29qgyDmifLBjTFdNrNvxxSXDgU8q9UO1yx0ObiN+T7fNw6QrwfdWbO1S/RVL0 gF0CXVlIRbyct79se4m/bVsL+DZUCr+nFZ8RMFHayA9BlbuvC1U8x2hm6LhQia/5cn3DWytaJ dGOcF7qn8JNCCop976XiNgLkw8GU/KprE3h45fDXGXFfNETCn7+HeAlluLez8nM+cYOaPLbhN YbjU5X96fOBnfdhhrmKiMWwwVG/4deimRs4Gu7ErQWSYY= Currently, the driver does only support a custom sysfs to allow userspace to read the fan speed. Add support for the standard hwmon interface so users can read the fan speed with standard tools like "sensors". Compile-tested only. Signed-off-by: Armin Wolf --- Changes since v1: - fix undefined reference error - fix fan speed validation - coding style fixes - clarify that the changes are compile-tested only - add hwmon maintainers to cc list The changes will be tested by Mikael Lund Jepsen from Danelec and should be merged only after those tests. --- drivers/acpi/Makefile | 1 + drivers/acpi/fan.h | 9 +++++ drivers/acpi/fan_core.c | 4 ++ drivers/acpi/fan_hwmon.c | 83 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 97 insertions(+) create mode 100644 drivers/acpi/fan_hwmon.c -- 2.39.2 diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index d69d5444acdb..c272ab2c93b9 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -83,6 +83,7 @@ obj-$(CONFIG_ACPI_TINY_POWER_BUTTON) += tiny-power-button.o obj-$(CONFIG_ACPI_FAN) += fan.o fan-objs := fan_core.o fan-objs += fan_attr.o +fan-$(CONFIG_HWMON) += fan_hwmon.o obj-$(CONFIG_ACPI_VIDEO) += video.o obj-$(CONFIG_ACPI_TAD) += acpi_tad.o diff --git a/drivers/acpi/fan.h b/drivers/acpi/fan.h index e7b4b4e4a55e..97863bdb6303 100644 --- a/drivers/acpi/fan.h +++ b/drivers/acpi/fan.h @@ -10,6 +10,8 @@ #ifndef _ACPI_FAN_H_ #define _ACPI_FAN_H_ +#include + #define ACPI_FAN_DEVICE_IDS \ {"INT3404", }, /* Fan */ \ {"INTC1044", }, /* Fan for Tiger Lake generation */ \ @@ -56,4 +58,11 @@ struct acpi_fan { int acpi_fan_get_fst(struct acpi_device *device, struct acpi_fan_fst *fst); int acpi_fan_create_attributes(struct acpi_device *device); void acpi_fan_delete_attributes(struct acpi_device *device); + +#if IS_REACHABLE(CONFIG_HWMON) +int devm_acpi_fan_create_hwmon(struct acpi_device *device); +#else +static inline int devm_acpi_fan_create_hwmon(struct acpi_device *device) { return 0; }; +#endif + #endif diff --git a/drivers/acpi/fan_core.c b/drivers/acpi/fan_core.c index ff72e4ef8738..7cea4495f19b 100644 --- a/drivers/acpi/fan_core.c +++ b/drivers/acpi/fan_core.c @@ -336,6 +336,10 @@ static int acpi_fan_probe(struct platform_device *pdev) if (result) return result; + result = devm_acpi_fan_create_hwmon(device); + if (result) + return result; + result = acpi_fan_create_attributes(device); if (result) return result; diff --git a/drivers/acpi/fan_hwmon.c b/drivers/acpi/fan_hwmon.c new file mode 100644 index 000000000000..b01055432ded --- /dev/null +++ b/drivers/acpi/fan_hwmon.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * fan_hwmon.c - hwmon interface for the ACPI Fan driver + * + * Copyright (C) 2024 Armin Wolf + */ + +#include +#include +#include + +#include "fan.h" + +/* Returned when the ACPI fan does not support speed reporting */ +#define FAN_SPEED_UNAVAILABLE 0xffffffff + +static umode_t acpi_fan_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, + int channel) +{ + return 0444; +} + +static int acpi_fan_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, + long *val) +{ + struct acpi_device *adev = dev_get_drvdata(dev); + struct acpi_fan_fst fst; + int ret; + + switch (type) { + case hwmon_fan: + ret = acpi_fan_get_fst(adev, &fst); + if (ret < 0) + return ret; + + switch (attr) { + case hwmon_fan_input: + if (fst.speed == FAN_SPEED_UNAVAILABLE) + return -ENODATA; + + if (fst.speed > LONG_MAX) + return -EOVERFLOW; + + *val = fst.speed; + return 0; + case hwmon_fan_fault: + *val = (fst.speed == FAN_SPEED_UNAVAILABLE); + return 0; + default: + break; + } + break; + default: + break; + } + + return -EOPNOTSUPP; +} + +static const struct hwmon_ops acpi_fan_ops = { + .is_visible = acpi_fan_is_visible, + .read = acpi_fan_read, +}; + +static const struct hwmon_channel_info * const acpi_fan_info[] = { + HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_FAULT), + NULL +}; + +static const struct hwmon_chip_info acpi_fan_chip_info = { + .ops = &acpi_fan_ops, + .info = acpi_fan_info, +}; + +int devm_acpi_fan_create_hwmon(struct acpi_device *device) +{ + struct device *hdev; + + hdev = devm_hwmon_device_register_with_info(&device->dev, "acpi_fan", device, + &acpi_fan_chip_info, NULL); + + return PTR_ERR_OR_ZERO(hdev); +}